This addon has the giant mob, it has 200 health and deals twice amount as normal zombies. This is my first add on so it may not be the best. I worked hard
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Changelog
Giants now have natural spawns by lighting strikes by zombie
The Giant's range is a little big (understandably) but that leads to it being almost impossible to melee it; the Giant also could do with an increased sight and a slightly increased speed, this would help against people simply spamming it with arrows from a distance.
The Giant doesn't have any real sound effects either, simply adding some sound to it would really help it come alive as a mob even more, maybe just a louder variant of the Zombie sounds!
Sometimes when you are using the spawn egg, you'll get a "Giant" Baby Zombie, but the Baby Zombie is just the regular Baby Zombie size; the "Giant" Baby Zombies are comedical, but it would be cool if they were Giant Baby Zombies, being big like the regular Zombies.
I also noticed that when they drown they will just turn into a regular drowned, it would be awesome if when they drowned they would turn into a Giant Drowned. You could even go a step further and add a Giant Husk!
Hope you receive these suggestions well!